What is an abstract noun for trapped?

There isn't a perfect one-word abstract noun for "trapped." However, depending on the context, you could use:

* Confinement: This emphasizes the physical restriction of being trapped.

* Imprisonment: This implies a more serious or formal type of confinement.

* Entrapment: This focuses on the feeling of being caught or ensnared.

* Captivity: This emphasizes a lack of freedom.

* Restriction: This suggests a limitation or constraint.

You could also use phrases like:

* A sense of entrapment

* The feeling of being trapped

The best choice will depend on the specific situation you're describing.